ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes in Accumulated Other Comprehensive Income By Component) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized Gains and Losses on Available- for-Sales Securities, Opening Balance	$ 3,836	$ 5,467	$ 5,467
Unrealized Gains and Losses on Available- for-Sales Securities, Other comprehensive income before reclassification	5,220		(1,606)
Unrealized Gains and Losses on Available- for-Sales Securities, Amounts reclassified from accumulated other comprehensive income (loss)	(31)		(25)
Unrealized Gains and Losses on Available- for-Sales Securities, Net current period other comprehensive income	5,189		(1,631)
Unrealized Gains and Losses on Available- for-Sales Securities, Ending Balance	9,025		3,836
Defined Benefit Pension Items, Opening Balance	(1,694)	(1,637)	(1,637)
Defined Benefit Pension Items, Other comprehensive income before reclassification	0		(204)
Defined Benefit Pension Items, Amounts reclassified from accumulated other comprehensive income (loss)	32		147
Defined Benefit Pension Items, Net current period other comprehensive income	32	(138)	(57)
Defined Benefit Pension Items, Ending Balance	(1,662)		(1,694)
Total, Opening Balance	2,142	3,830	3,830
Total, Other comprehensive income (loss) before reclassification	5,220		(1,810)
Total, Amounts reclassified from accumulated other comprehensive income (loss)	1		122
Total, Net current period other comprehensive income	5,221	$ 2,039	(1,688)
Total, Ending Balance	$ 7,363		$ 2,142